A substance is at a temperature and pressure that places it directly on the liquid-vapor equilibrium line of its phase diagram. Which phase will it become if the temperature increases while the pressure remains constant?

false

because it does not have the potential to be entirely used up

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.